(If you have an iPhone 8 or older, just hold down the side or top button, then drag the power off slider.) If your iPhone isn't responding to that, then you'll want to force a restart.

A force restart can help resolve temporary software glitches that might be causing your iPhone to reboot repeatedly. If it's nothing major, this should fix your problem and save you a lot of time ...

Quickly restart your iPhone in iOS 17, too If you can't or don't want to upgrade to iOS 18, there's still a trick to restart your iPhone more quickly. There are two ways to do this.

Learn how to force restart, enter recovery mode, and use DFU mode on iPhones 8 to 16. Step-by-step guide to fix software and firmware issues.